William Atherton
William appeared just the once on Stargate SG1 playing Emissary Varta in Collateral Damage. He’s had recurring roles on Life and Centennial, guest starred on Castle, Monk and Lost and had supporting roles on Ghostbusters, Die Hard and has been excellent on Defiance. IMDB

Kevin Blatch
Kevin played Tobias in the Stargate SG1 episode Ex Deus Machina and has guest starred on Psych, Millennium, The Net, Flash Gordon and Hell On Wheels. IMDBTwitterLisa Bayliss
Lisa played the Senator’s Wife on the Stargate SG1 episode The Road Not Taken and appeared on MacGyver, Sleepwalkers, Viper and Personally Yours. IMDBPeter Kufluk
Peter played a technician on the Stargate SG1 episode Lost City: Part 2 and he has also been on The Collector, Trixie and Gaia Short. IMDB